Declension table of ?koṣṭhya

Masculine	Singular	Dual	Plural
Nominative	koṣṭhyaḥ	koṣṭhyau	koṣṭhyāḥ
Vocative	koṣṭhya	koṣṭhyau	koṣṭhyāḥ
Accusative	koṣṭhyam	koṣṭhyau	koṣṭhyān
Instrumental	koṣṭhyena	koṣṭhyābhyām	koṣṭhyaiḥ koṣṭhyebhiḥ
Dative	koṣṭhyāya	koṣṭhyābhyām	koṣṭhyebhyaḥ
Ablative	koṣṭhyāt	koṣṭhyābhyām	koṣṭhyebhyaḥ
Genitive	koṣṭhyasya	koṣṭhyayoḥ	koṣṭhyānām
Locative	koṣṭhye	koṣṭhyayoḥ	koṣṭhyeṣu

Compound koṣṭhya -

Adverb -koṣṭhyam -koṣṭhyāt